Jidokan Ahopsu

Kang Yeon-Woo, a mechanic on the Apollo team, is brutally rejected by fellow team member and celebrity racer Seo Beom-Min, leading to his resignation. Later, desperate for rent money, he joins the Carmine team as a mechanic. Rumors of him flirting with drivers circulate, leading to verbal abuse from Kim Tae-Heung, a veteran member of the team. Fortunately, thanks to Choi Ha-Yoon's intervention, the situation is resolved quietly, and this incident sparks a series of fateful encounters between the two...

(Source: Bomtoon, translated)

Note: Chapter count includes two side story chapters.